<div class="wrapper">
  <mat-form-field style="width: 50vw;height: 20vh; margin-bottom: 10vh;">
    <textarea
      style="width: 50vw;height: 20vh;"
      matInput
      placeholder="please input your copyright"
      [(ngModel)]="formData.copyright"
    ></textarea>
  </mat-form-field>
  <div><button mat-raised-button (click)="onSubmit()" color="primary">submit</button></div>
</div>